A single flash typically indicates a system lockout due to failed ignition attempts

Broad Compatibility: Seamlessly fits into Hankison HF Series 16 housing assemblies

guaranteeing exact electrical matching for compatible compressor models

serving as the certified SP12137 replacement

Smith and Lochinvar systems

Lochinvar & A.O. Smith 100158115 Pressure Switch 324846-701 A single flash typically indicatesMaintaining proper combustion and safety protocols in high efficiency water heating systems requires precision components like the Lochinvar & A. O. Smith 100158115 Pressure Switch. This genuine OEM replacement part is a normally closed (N. C.) air pressure switch factory calibrated to a 1. 42" WC (Water Column) set point. It serves as a blocked inlet air pressure switch, functioning as a critical safety limit that monitors the differential pressure